# Configure an Event Handler

To configure an event handler, follow these steps.

To configure an event handler

1. Stop the connector.
2. Open the connector’s configuration file in a text editor.

3. Set the `OnStart`, `OnFinish`, `OnError`, or `OnQueueEvent` parameter to specify the name of a section in the configuration file that contains the event handler settings.

   - To run an event handler for all asynchronous actions, set these parameters in the `[Actions]` section. For example:

         [Actions]
         OnStart=NormalEvents
         OnFinish=NormalEvents
         OnError=ErrorEvents

   - To run an event handler for specific actions, use the action name as a section in the configuration file. The following example calls an event handler when the Fetch action starts and finishes successfully:

         [Fetch]
         OnStart=NormalEvents
         OnFinish=NormalEvents

4. Create a new section in the configuration file to contain the settings for your event handler. You must name the section using the name you specified with the `OnStart`, `OnFinish`, `OnError`, or `OnQueueEvent` parameter.

5. In the new section, set the `LibraryName` parameter.

   `LibraryName` | The type of event handler to use to handle the event: To write event data to a text file, set this parameter to `TextFileHandler`, and then set the `FilePath` parameter to specify the path of the file. To send event data to a URL, set this parameter to `HttpHandler`, and then use the HTTP event handler parameters to specify the URL, proxy server settings, credentials and so on. To run a Lua script, set this parameter to `LuaHandler`, and then set the `LuaScript` parameter to specify the script to run. For information about writing the script, see Write a Lua Script to Handle Events.

   For example:

       [NormalEvents]
       LibraryName=TextFileHandler
       FilePath=./events.txt

       [ErrorEvents]
       LibraryName=LuaHandler
       LuaScript=./error.lua

6. Save and close the configuration file. You must restart Facebook Connector for your changes to take effect.

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